Type alias Filter<T, P, Acc>

Filter<T, P, Acc>: T extends readonly [infer F, ...(infer Rest extends readonly unknown[])]
    ? [F] extends [P]
        ? Filter<Rest, P, [...Acc, F]>
        : Filter<Rest, P, Acc>
    : readonly [...Acc]

Filters out all members of T that are not P

Type Parameters

T extends readonly unknown[]
Items to filter
P
Type to filter out
Acc extends readonly unknown[] = []

Returns

Filtered items

Example

type Result = Filter<['a', 'b', 'c'], 'b'>
//   ^? type Result = ['a', 'c']

Type alias Filter<T, P, Acc>

Type Parameters

T extends readonly unknown[]

P

Acc extends readonly unknown[] = []

Returns

Example

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